Stapling machine



Feb. 23, 1932. M. VOGEL.

STAPLING MACHINE Filed Dec. 16, 1930 Patented Feb. 23, 1932 UNITED STATES PATENT OFFICE mm mm. or rmnxronr-ou-mum, GERMANY srarmne mom Application filed December 10, 1930, Serial ll 'o. 502,807, and in Germany December 21, 1929.

This invention relates to a hand operated stapling machine and particularly to a machine in the form of a hand hammer, in which the driving of the staples into a solid supt" port is effected bythe impetus due to a weight, which is articulated to the hammer handle. The machine is intended chiefly for fastening thin articles to asolid support, on which the fastening point need not be accurately determined, for example when stapling address labels on box lids, barrels and the-like.

The invention has for its object, to produce a simple, light and practical machine, which difiers chiefly from the known devices by the peculiarly constructed staple guide in the hammer handle and by the practical feeding of the staples.

Several embodiments of the invention are illustrated by way of example in the accompanying drawings in which Fig. 1 shows a stapling machine in side elevation partly in longitudinal section.

Fig. 2 is a front elevation of Fig. 1, the swing weight being omitted.

Fig. 3 is a cross section on line III-III of Fig. 1.

l igf shows in top plan view partly in longitudinal section the stapling, machine illustrated in Fig. 1.

Figs. 5 and 6 each show a form of construction both slightly differing from that shown in Fig. 1. a

The stapling machine according to Figs. 1 to 4 consists of a tubular hammer handle 1, which is fastened at its front end in a tubular extension 2 of a plate 3. A guide plate 5 is fixed on the plate 3' by means of screws 4. This guide plate 5 has a slot 6 extending the entire length of the guide plateand designed to slidably accommodate a staple ram 7. In a. tube clip 8, fixed on the end of the hammer handle 1, a pivot pin 9 is fixed on which a rod 10 is hingedly mounted. The free end of this rod 10 is guided in slots 11, 12 of the plate 3 and the guide plate 5 respectively and carries a weight 13 on its end projecting from .the slots 11 and 12. The staple ram 7 has a continuous bore 14 corresponding to the diameter of the rod 10 extending through this bore. The rod 10 can slide in the guide slots 11 and 12 and transmits its upward and downward movements to the staple ram 7 The plate 3 has two guide bars 15 and 16 on its rear side standing on the extension 2 and holding between them a spiral spring 17. This spring bears against the extension 2 of the plate 3 and against the rod 10, holding this latter in raised, inoperative position, so that the staple ram 7 liberates the passage for the staples 33 from the hammer handle 1 into the slot 6. One staple is fed into' the slot 6, when the staple ram 7 is in this position, by means of a feeding device for the staples which will hereinafter described. This staple is held 1n the slot 6 by a locking nose 18 in the manner more fully describedin my U. S. Patent 1,740,322.

If the stapling machine is struck against the label to be attached, the rod 10 is swung downwards under the action of the weight 13 and, owing to the shifting of the staple ram 7 thus effected, drives the staple situat-v the action of the spring 17, carrying the staple ram 7 with it, so that a fresh staple can enter the slot 6 when the machine is again ready for use.

The feeding of the staples 33 under the staple ram 7 is effected through the tubular hammer handle 1. A U-shaped guide bar 21 is fixed in this handle 1 by means of screws Hand 20, and the staples 33 are arranged in a row on the'arms of this bar. The arms of the bar 21 extend so far towards the inner surface of the tube 1 serving as hammer handle, that the space between the ends'of these arms and the inner surface of the tube is just The machine can therefore be made much simler. 1

The constructional parts serving for the automatic feed of the staples 33 under the staple ram are arranged inthe U-shaped bar- 21 and consist of a bent sheet metal rider 22 slidably riding on the guide bar behind the row of staples 33, a guide rod 23 and a spring 24 wound around this rod 23. A nose 25 extends vertically downwards from the web of the rider 22 between the arms of the same. This nose 25 has a bore 26, in which the rod 23 is slidably guided. In order to prevent the rider 22 from slipping off the guide rod 23, the front end 27 of this rod is thickened. The ide rod 23 is fastened to a cap 28 closingt e hammer handle 1, so that the rider 22 presses under the action of the spring 24 against the row of staples 33 situated in front of it on the bar 21. The row of staples is advanced a distance equal to one staple by the rider 22, after a staple has been ejected and the staple ram 7 has returned into its inoperative position.

The inserting of the staples 33 into the hammer handle 1 is effected, after the closing cap 28 has been removed by turning and removing the guide rod 23 connected therewith, and the rider 22. The edge 29 of the cap 28 has an angular slot 30 in the enlarged portion 32 of which a pin 31 fixed on the hammer handle 1 engages. The pin 31 is held by the action of the spring 24 in the enlarged portion 32 of the slot in the cap 28 and secures same against unintentional loosening.

Owing to the above described arrangement of the removable cap 28, in conjunction with the guide rod 23 and the rider 22, the inserting of a fresh row of staples can be efiected quickly and in a simple manner.

The machine is particularly remarkable for its great simplicity.v The movable elements are limited to a minimum, whereas the strength, especially of the striker head, is increased by the omission of movable feeding elements for the staples. Moreover making the hammer handle as 'a tube increases the stability of the machine, so that it can be made lighter than the known construction. 7 The form of construction illustrated in Fig. 5 differs from the example shown in Figs. 1 to 4 by the diiferent arrangement of the weight 13 and of the spring 17'. The weight'13 in this form of construction is fixed on the rod 10' behind the plate 3. The weight 13 has a blade spring 17 on its under side,

which spring bears slidabl on the hammerv handle 1 and holds the ro 10' in the inoperative position. The closing element of the hammer handle 1, which is shorter than that in the construction shown in Figs. 1 to 4, is made as a handle 28' and screwed to the-hammer handle 1.

In the form of construction illustrated in 'Fig. 6 the weight 13" is of -U-shape, and the arms- 34 and 35 of the same straddle the staple ejecting device 3, 5, 7. A bolt 36 transmits the movement of the weight 13" to the ram 7 and is screwed onto the front arm 34 and passes through the slot 14 of the ram 7. The end-ofthe bolt 36 engages in a cavity 37 iii the arm 35 and is thus protected against bending. The rod 10" is made in one piece with the weight 13" andhinged .to the tube 8 by means of the pin 9. A spreading spring 17" serves for returning the weight 13 and rod 10" into their inoperative positions. This spring 17" is bent from a wire to form a closed front end 38 bent downwards and engaging over the rod 10", whereas the two arms are curveddownwards and then forwards so that the ends 39 bear against the tubbular hammer handle 1.

The machines illustrated in the drawings are merely shown as practical forms of construction for carrying out the invention but they can be modified within wide limits without departing from the scope of the invention.

I claim :r

1. A stapling machine inthe shape of a hand hammer, comprising in combination a handle, a weight hingedly connected to said handle, a staple ram adapted to be actuated by said weight, a staple guide in said handle, a removable element adapted to close the end of said handle and to be removed for inserting the staples in said handle, and means for continually feeding the staples under said ram.

2. A stapling machine in the shape of a hand hammer, comprising in combination a hollow handle, a weight hingedly connected to said hammer, a spring adapted to hold said weight in the inoperative position, a staple ram adapted to be actuated by said weight, a guide bars for the staples fixed in said hollow handle a removable element adapted to close the en of said handle and to be removed for introducing the staples onto said guide bar, and means for feeding the staples successively under said ram.

3. A stapling machine in the shape of a hand hammer, comprising in combination a tubular handle, a one armed lever hingedly mounted on said handle, a weight on said lever, a spring between said handle and said lever adapted to hold said lever in the inoperative position, a head on the end of said handle, a ram slidable in said head adapted to be actuated by said lever, a staple guide bar in said tubular handle, a removable ca on the rear end of said handle ada ted to c ose said handle and to be removed or insertion of the staples into said handle, and means for successively bringing said staples under said ram.

4. A stapling machine in the form of a hand hammer, comprising in combination a tubular handle, a one armed lever hingedly mounted on said handle, a weight on said lever, a spring between said handle and said lever adapted to hold said lever in the inoperative position, a head on the end of said handle, a staple 'ram slidably mounted in said I head adapted to be actuated by said lover, a

staple guide bar in said tubular handle adapted 1n conjunction with the inner surface of said handle to ids the staples in said handle, a guide in said staple guide bar, a l0 rider on said rod adapted to slide on said bar,

a spring wound around said guide rod adapted to feed the staples successively under said staple ram, and a removable cap ada ted to close the rear end of said tubular han e car- 15 rying said guide rod and to be removed together with said rod, said rider and said spring for the insertion of the staples into i h 11m 11 testimony w ereo m ture.

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